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P. B. MATHIASON.

PULVBRIZER.

No. 370,880. n Patented Oct. 4, 1887.

UNITED STATES PATENT CEEICE.

PETER is. MATHIASON, oE ST. LOUIS, MISSOURI.

PuLvERizER.

SPECIFICATION forming part of Letters Patent No. 370,880, dated October 4, 1887.

Application tiled June 28, 1886. Serial No. 206,477.

To all whom it may concern:

Be it known that I, PETER B. MATHIAsoN, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Iniprovement in Pulverizers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings,forming part of this specification, and in which- Figure 1 is a top or plan view of my improved machine. Fig. 2 is a vertical part section taken on line 2 2, Fig. 1. Fig. 3 is a front end View. Fig. 4 is a vertical section taken on line 4 4, Fig. 1, the disk being partly broken away. Fig. 5 is a detail ViewV showing the means for holding the pulverizing blades or fingers in place. Fig. v6 is a detail view showing some of the possible adjustments of the moving fingers, as hereinafter fully described.

My invention relates to an improved machine intended more particularly for pulverizing clay in the manufacture of bricks, but whichy may be used for other purposes; and my invention consists in features of novelty, hereinafter fully described, and pointed out in the claims.

Referring to the drawings, A represents a case or housing, provided with a feed-hopper, B, and within which is located a wheel or disk, C, secured to a shaft, D, located without the housing and supported in journal-boxes E, secured to a suitable stand, F, and the shaft is provided with va driving-pulley, Gr. When the power is applied to the shaft, the wheel or disk is turned in the direction indicated by the arrow, Fig. 4. V

Secured to the disk or wheel are a. number of straight fingers or blades, H, of oblong shape in cross-section, whose ends are fitted invertibly in openings orsockets in the wheel by keys I, as shown in Figs. 4 and 5. There may be any number of these fingers or blades, and I have shown eight.

The openings or perforationsin the disk or wheel for the reception of these fingers or blades are preferably made opposite heads J of ribs J, formed upon the disk or wheel, (see dotted lines in Fig. 4,) said heads being also provided with perforations coinciding with those of the disk, the blades and keys being held in place (No model.)

by set-screws L, tapped into the said heads and bearing against them.

.The keys and fingers (when placed together) form a rectangular cube, as shown, so that they may be inverted so as to present different working edges of the ngers toward the working edges of the stationary fingers, hereinafter mentioned. For example, referring to Fig. 6, it will be seen that the fingers H. may be turned with their greater width in a direction radial to the disk G and upon either side of the key I, as shown at 1 and 2, or they may be turned in a position at right angles to that shown at land 2 and placed above or below the key, as shown at 3 and 4, the lfixed ngers M (shown in dotted lines) being capable of similar adjustment, thus successively presenting all of the four edges of the rotary fingers toward the working-edges of the stationary fingers, so that when one edge becomes dull another may be put in use. These fingers H work in conjunction with and pass between straight stationary fingers M, secured to the front wall of the casing or housing A, as shown in Figs. 2, 4, and 6. rlhey are secured in holes or mortises in the housing by keys N,

and are made reversible or invertible in the same manner as the fingers H of the disk, and for the saine purpose. There are a number of these fingers M, arranged in an upper and a lower Series, as shown in Fig. 4, and they preferably surround about half of the circumference of the disk. As the clay is discharged into the hopper B (as shown by featherless arrow in Fig. 2) it falls upon these ngers, and the revolving fingers H act to cut and break `it up, so as to pulverize it, and it then falls from the fingers'through an opening, O, in the bottom of the housing, as shown in Figs. 2 and 4. One series of fingers H are arranged to pass over the upper series of fingers M, so as .to grind and pulverize the dirt as it falls upon the upper series of fingers M from the hopper, and the other series of fingers H pass over the lower series of fingers M to grind and pulverize the dirt as it falls from the upper series of ngers M onto the lower series.

It will be seen that as the iixedv fingers M project to within a short distance of the face of the disk C the dirt or clay cannot escape from the machine until it has been dis- IOC) integrated to a sufcient degree of hneness to enable it to pass between said fingers. Upon thc distance apart of the iingers,therefore,depends the coarseness of the material which has passed through the machine, and to provide simple and efiicient means whereby the operator may change this at will is one of the objects o1' my invention. In order to accomplish this I make the lingers of oblong shape in crosssection and secure them in rectangular or other noncircular perforations or sock ets in the machine in the manner already described.

The operator may secure a maximum distance between the fingers by placing them with their greatest width in a direction radial to the disk, (the bottom row being shown in this position in Figs. 3 and 4,) or he may secure a minimum distance between them by placing them in the position in which the upper row is shown in the same figures.

A pulverizer thus constructed is cheap and durable and is capable of pulverizing a large amount of clay in a short time.

I claim as my inventionl. In a clay-pulverizer, a disk having strengtheningribs J, perforations through said disk and ribs, ngers having their ends inserted in saidperforatons,keys also itting in said perforations, and set-screws for holding said keys and fingers in place, substantially as set forth.

2. In aclay-pulverizer, a casing having rectangular perforations, straight ngers of 0blong shape in crosssection tted invertihly at their ends in said perforations, the rectangular keys, also iittcd'in said perforations for iilling the spaces not occupied by the fingers, and setserews for holding said fingers and keys in place, substantially as set forth.

PETER B. MATHIASON.

In presence of- Gno. H. KNIGHT, EDW. S. KNIGHT. 

